I've never used a sandblaster, but I know they can be rented, and I have a number of projects coming up this summer that would benefit from a good sandblasting. Actually, I'd be the biggest beneficiary. It occurred to me that if leaving creosote in the firebox over the summer is a potential corrosion problem, would there be anything to be gained from sandblasting it all off of there and then maybe putting a layer of oil on the steel? More trouble than it's worth? Bad for the boiler? Risk that I might get into it too much and wind up buying a compressor and accessories?